Storing date value into Core Data in Objective C - objective-c

Question

Can anyone tell me please how to save only date value to Core Data using objective C? I am using UIDatePicker. I searched a lot, but couldn't find any. Can you be more specific because i am newbie. Thanks
Here is my code for adding data to core data database. But instead of formatting dates into string I would like to save as a NSdate. I am creating an calendar app that stores events into CoreData. Is there any help?
- (IBAction)btnSave:(UIBarButtonItem *)sender {
AppDelegate *delegate = [UIApplication sharedApplication].delegate;
NSManagedObjectContext *context = [delegate managedObjectContext];
NSManagedObject *dataRecord = [NSEntityDescription insertNewObjectForEntityForName:#"Scheduler" inManagedObjectContext:context];
[dataRecord setValue:self.txtBxCustomerName.text forKey:#"customerName"];
[dataRecord setValue: [self date] forKey:#"date"];
[dataRecord setValue:[self begin] forKey:#"startTime"];
[dataRecord setValue:[self end] forKey:#"endTime"];
NSError *error;
if (![context save:&error]) {
NSLog(#"Error! %#", error);
}
[self dismissViewControllerAnimated:true completion:nil];
}
- (IBAction)datePicker:(id)sender {
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"MM-dd-yyyy"];
NSString *string = [dateFormat stringFromDate:self.dateTime.date];
date = string;
}
- (IBAction)startTimePicker:(id)sender {
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"HH:mm"];
NSString *str = [timeFormat stringFromDate:self.startTime.date];
begin = str;
}
- (IBAction)endTimePicker:(id)sender {
NSDateFormatter *endTimeFormatt = [[NSDateFormatter alloc] init];
[endTimeFormatt setDateFormat:#"HH:mm"];
NSString *sting = [endTimeFormatt stringFromDate:self.endTime.date];
end = sting;
}

Answer 1

Get the date from the picker with
NSDate *chosenDate = myDatePicker.date;
and then set it to the desired attributed (in the example startDate) of your model, which should be define in Core Data as type Date
myCoreDataObject.startDate = chosenDate;
or even shorter
myCoreDataObject.startDate = myDatePicker.date;